Genetic variation in a cline in a living intertidal snail arose in the Neogastropoda over 100 million years ago.

Abstract excerpt

To understand how species adapt and evolve it is necessary to appreciate the relationship between genetic variation and the environment. Here, the fossil record and molecular data from different lineages of the marine Gastropoda are used to understand the evolution of genetic variations found in the nuclear gene for mitochondrial malate dehydrogenase (mMDH; EC 1.1.1.37) in the living intertidal Muricid snail,...

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